205102102 has 16 divisors (see below), whose sum is σ = 315511200. Its totient is φ = 99964480.

The previous prime is 205102099. The next prime is 205102111. The reversal of 205102102 is 201201502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4524 + ... + 20752.

It is an arithmetic number, because the mean of its divisors is an integer number (19719450).

Almost surely, 2^205102102 is an apocalyptic number.

205102102 is a deficient number, since it is larger than the sum of its proper divisors (110409098).

205102102 is a wasteful number, since it uses less digits than its factorization.

205102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16391.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 205102102 is about 14321.3861759258. The cubic root of 205102102 is about 589.7347289726.

Adding to 205102102 its reverse (201201502), we get a palindrome (406303604).

The spelling of 205102102 in words is "two hundred five million, one hundred two thousand, one hundred two".